Xeon Platinum 8280 vs Xeon w5-2455X
Xeon Platinum 8280
Xeon w5-2455X
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon Platinum 8280
Performance Per Dollar Xeon w5-2455X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon Platinum 8280 | Xeon w5-2455X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($2,940) | ✅ More affordable ($1,049) |
| Longevity | ✨ Modern (Cascade Lake-SP (2018) / 14 nm) | ✨ Modern (Sapphire Rapids (2023−2024) / Intel 7 nm) |
💎 Value Proposition
| Insight | Xeon Platinum 8280 | Xeon w5-2455X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+182%) |
| Upfront Cost | ⚠️ Higher cost ($2,940) | ✅ More affordable ($1,049) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Xeon Platinum 8280 and Xeon w5-2455X
Xeon Platinum 8280
The Xeon Platinum 8280 is manufactured by Intel. It was released in 11 December 2018 (6 years ago). It is based on the Cascade Lake-SP (2018) architecture. It features 28 cores and 56 threads. Base frequency is 2.7 GHz, with boost up to 4 GHz. L3 cache: 38.5 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA3647. Thermal design power (TDP): 205 Watt. Memory support: DDR4-2933. Passmark benchmark score: 36,830 points. Launch price was $10,009.
Xeon w5-2455X
The Xeon w5-2455X is manufactured by Intel. It was released in 15 February 2023 (2 years ago). It is based on the Sapphire Rapids (2023−2024) architecture. It features 12 cores and 24 threads. Base frequency is 3.2 GHz, with boost up to 4.6 GHz. L3 cache: 30 MB. L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 200 Watt. Memory support: DDR5-4800. Passmark benchmark score: 37,109 points. Launch price was $1,039.
Processing Power
The Xeon Platinum 8280 packs 28 cores / 56 threads, while the Xeon w5-2455X offers 12 cores / 24 threads — the Xeon Platinum 8280 has 16 more cores. Boost clocks reach 4 GHz on the Xeon Platinum 8280 versus 4.6 GHz on the Xeon w5-2455X — a 14% clock advantage for the Xeon w5-2455X (base: 2.7 GHz vs 3.2 GHz). The Xeon Platinum 8280 uses the Cascade Lake-SP (2018) architecture (14 nm), while the Xeon w5-2455X uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the Xeon Platinum 8280 scores 36,830 against the Xeon w5-2455X's 37,109 — a 0.8% lead for the Xeon w5-2455X. L3 cache: 38.5 MB (total) on the Xeon Platinum 8280 vs 30 MB on the Xeon w5-2455X.
| Feature | Xeon Platinum 8280 | Xeon w5-2455X |
|---|---|---|
| Cores / Threads | 28 / 56+133% | 12 / 24 |
| Boost Clock | 4 GHz | 4.6 GHz+15% |
| Base Clock | 2.7 GHz | 3.2 GHz+19% |
| L3 Cache | 38.5 MB (total)+28% | 30 MB |
| L2 Cache | 1 MB (per core) | 2 MB (per core)+100% |
| Process | 14 nm | Intel 7 nm-50% |
| Architecture | Cascade Lake-SP (2018) | Sapphire Rapids (2023−2024) |
| PassMark | 36,830 | 37,109 |
Memory & Platform
The Xeon Platinum 8280 uses the LGA3647 socket (PCIe 3.0), while the Xeon w5-2455X uses LGA4677 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 2933 on the Xeon Platinum 8280 versus 4800 on the Xeon w5-2455X — the Xeon w5-2455X supports 48.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon w5-2455X supports up to 2048 of RAM compared to 1536 — 28.6% more capacity for professional workloads. Memory channels: 6 (Xeon Platinum 8280) vs 4 (Xeon w5-2455X). PCIe lanes: 48 (Xeon Platinum 8280) vs 64 (Xeon w5-2455X) — the Xeon w5-2455X offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: LGA3647 (Xeon Platinum 8280) and W790 (Xeon w5-2455X).
| Feature | Xeon Platinum 8280 | Xeon w5-2455X |
|---|---|---|
| Socket | LGA3647 | LGA4677 |
| PCIe Generation | PCIe 3.0 | PCIe 4.0+33% |
| Max RAM Speed | 2933 | 4800+64% |
| Max RAM Capacity | 1536 | 2048+33% |
| RAM Channels | 6+50% | 4 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 48 | 64+33% |
Advanced Features
Only the Xeon w5-2455X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Both support VT-x, VT-d virtualization. Direct competitor: Xeon Platinum 8280 rivals EPYC 7702; Xeon w5-2455X rivals Threadripper 7960X.
| Feature | Xeon Platinum 8280 | Xeon w5-2455X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d | VT-x, VT-d |
Value Analysis
The Xeon Platinum 8280 launched at $10009 MSRP, while the Xeon w5-2455X debuted at $1039. At current prices ($2940 vs $1049), the Xeon w5-2455X is $1891 cheaper. In terms of value (PassMark points per dollar), the Xeon Platinum 8280 delivers 12.5 pts/$ vs 35.4 pts/$ for the Xeon w5-2455X — making the Xeon w5-2455X the 95.4% better value option.
| Feature | Xeon Platinum 8280 | Xeon w5-2455X |
|---|---|---|
| MSRP | $10009 | $1039-90% |
| Avg Price (30d) | $2940 | $1049-64% |
| Performance per Dollar | 12.5 | 35.4+183% |
| Release Date | 2019 | 2023 |
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